On-the-job civil servants who have reported their work units at the time of registration have resigned during the interview. Non-official, do not need to provide proof of consent to enter oneself for an examination, just need to provide relevant resignation certificate. If it is a public office, you can't just resign. You can send an application form from your company to participate in the qualification examination.
For more information about the public examination, please refer to: Sichuan Zhonggong Education-Civil Service Examination Network.
If in doubt, please consult the public education enterprises in China.